Laser weld tracking is a machine vision technology that can track the location of welds and guide robots to weld, achieving high-quality metal processing welds.

The laser weld tracking sensor adopts the principle of laser triangle reflection, that is, the laser beam is amplified to form a laser line and projected onto the surface of the object being measured. The reflected light passes through the high-quality optical system and is projected onto the imaging matrix. After calculation, the sensor’s Information on the distance and position of the surface being measured along the laser line. By moving the measured object or the profilometer probe, a set of three-dimensional measurements can be obtained. The information obtained can be used for weld seam search and positioning, weld seam tracking, adaptive welding parameter control, weld seam formation detection and real-time transmission of information to the manipulator unit to complete various complex weldings, avoid welding quality deviations, and achieve unmanned welding.

Laser welding seam tracking technology improves welding quality and reduces production costs. The incidence of workpiece clamping deviation and thermal deformation of sheet metal parts is greatly reduced, the frequency of manual repair welding is also reduced, and the production cost is reduced a lot. Laser welding seam tracking technology has the advantages of high efficiency, accuracy and reliability, and is widely used in industrial manufacturing fields, such as automobile manufacturing, aerospace, electronics manufacturing, etc. With the development of advanced manufacturing technology, it has become an inevitable trend to realize automation and intelligence of welding tracking. The future development and prospects of laser welding tracking technology are very promising.